EP0993098A2 - Dispositif pour la régulation d'un alternateur pour véhicules - Google Patents

Dispositif pour la régulation d'un alternateur pour véhicules Download PDF

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Publication number
EP0993098A2
EP0993098A2 EP99203216A EP99203216A EP0993098A2 EP 0993098 A2 EP0993098 A2 EP 0993098A2 EP 99203216 A EP99203216 A EP 99203216A EP 99203216 A EP99203216 A EP 99203216A EP 0993098 A2 EP0993098 A2 EP 0993098A2
Authority
EP
European Patent Office
Prior art keywords
pulley
driving shaft
control
regulating device
shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99203216A
Other languages
German (de)
English (en)
Other versions
EP0993098A3 (fr
Inventor
Alfio Morone
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Adler SpA
Original Assignee
Adler SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Adler SpA filed Critical Adler SpA
Publication of EP0993098A2 publication Critical patent/EP0993098A2/fr
Publication of EP0993098A3 publication Critical patent/EP0993098A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/1004—Structural association with clutches, brakes, gears, pulleys or mechanical starters with pulleys

Definitions

  • the present invention relates to a control and regulating device for electric generators in vehicles with an internal-combustion engine.
  • crankshaft and electric generator The transmission ratio between crankshaft and electric generator is generally chosen so that, at low engine speeds, the generator is able to supply sufficient current to satisfy the normal requirement, which includes recharging the battery.
  • the present technology solves these problems by increasing the transmission ratio between crankshaft and current generator so as to maintain in all cases a high speed of rotation of the latter.
  • the technical problem which is posed, therefore, is that of providing a device for controlling and regulating current generators in vehicles with an internal-combustion engine, which is designed to ensure operation of the generator with a high current output and high overall efficiency, independently of the speed of the vehicle engine.
  • a device for controlling and regulating an electric generator such as an alternator for vehicles, in which the shaft of the electric generator is driven via a flexible friction-member transmission by a driving shaft, such as the crankshaft of an internal-combustion engine of a vehicle or a shaft connected thereto, and comprises a pulley on the driving shaft and a pulley on the driven shaft, around which pulleys a transmission belt is wound, each pulley respectively consisting of two opposite half-pulleys which are locked in rotation with respect to the associated shafts and the relative axial distance of which varies automatically according to the variations in speed of the driving shaft.
  • a driving shaft such as the crankshaft of an internal-combustion engine of a vehicle or a shaft connected thereto
  • the device for controlling and regulating an electric generator is arranged between a driving shaft 1, which is supported by means of bearings 1c and moved by the shaft of an internal-combustion engine (not shown) for vehicles by means of a pulley 1a keyed onto the shaft 1 itself and an associated belt 1b, and a driven shaft 2 of an electric generator 20, such as an alternator, used in a vehicle.
  • the driving shaft 1 essentially consists of a counter-shaft of the crankshaft, but could also consist of the latter or of a gear transmission or the like.
  • This driving shaft or counter-shaft 1 has the function of increasing the speed of rotation of the shaft 2 of the generator with respect to the speed of rotation of the crankshaft.
  • the transmission between the driving shaft 1 and the driven shaft 2 is provided by means of the device according to the invention which is essentially formed by a V-belt which is endlessly wound onto two pulleys which are keyed onto the respective shaft and each of which consists of two opposite half-pulleys, the relative distance of which varies automatically according to the speed of the driving shaft, as will be explained in greater detail below.
  • a pulley 4 of a driving shaft 1 comprises a fixed conical half-pulley 40, for example force-fitted onto the driving shaft 1 on a circumferential shoulder thereof and a conico-cylindrical half-pulley 41 mounted on the shaft by means of its hub portion 41a and axially movable with respect to the fixed half-pulley 40.
  • the movable half-pulley 41 is fastened onto the driving shaft 1 so as not to be able to rotate with respect thereto.
  • connection system consisting of splined profiles 44a, 44b between the conico-cylindrical half-pulley 41 and a flange 42 rigidly connected to the driving shaft 1 by means of an end screw 43a.
  • the splined profiles are correspondingly formed on the periphery of the flange 42 and on the internal diameter of the cylindrical portion of the movable half-pulley 41.
  • the flange 42 which is bell-shaped, acts as an axial-sliding guide for the movable half-pulley 41 and as a seat for a helical spring 45 which is mounted coaxially with the driving shaft 1 and has its ends arranged between the flange 42 and the movable half-pulley 41 so as to oppose the movement of the latter away from the fixed half-pulley 40.
  • a pulley 5 on a driven shaft 2 comprises a fixed conical half-pulley 6 keyed onto the driven shaft 2 by means of a nut 6a and a conical half-pulley 7 axially movable with respect to the fixed half-pulley 6, so as to form a groove 53 of variable width in the axial direction.
  • the movable half-pulley 7 may in fact be made of plastic.
  • the movable half-pulley 7 is fastened onto the driven shaft 2 so as not to be able to rotate with respect thereto.
  • the half-pulley 5 has a conico-cylindrical shape and, in its cylindrical portion, opposite to the fixed conical half-pulley 6, has a cavity 8 provided peripherally with projections 8a and intended to engage slidably with the corresponding splined profile 8b of a flange 9 rigidly connected to the driven shaft 2, for example welded to a thicker portion thereof.
  • the cavity 8 has several radial-travel tracks 8c for at least one pair of centrifugal masses 8d which are designed to come into contact with the flange 9 so as to cause the movement, away from it, of the movable half-pulley 7 and therefore its movement towards the fixed half-pulley 6.
  • centrifugal masses 8b have a cylindrical - optionally hollow - shape and therefore a circular cross-section designed to interact with the flange 9.
  • a pulley 50 on a driven shaft 2 comprises a fixed conical half-pulley 60 which is keyed onto the driven shaft 2 by means of a nut 60a and a conical half-pulley 70 which is axially movable with respect to the fixed half-pulley 60.
  • the pulley 50 has a conico-cylindrical shape and, in its cylindrical portion opposite to the fixed conical half-pulley 60, has a cavity 80 similarly slidable with splined profiles 80a, 80b, as in the first embodiment.
  • the cavity 80 has several radial-travel tracks 80c for at least one pair of centrifugal masses 80d which are intended to come into contact with the flange 9 so as to cause the movement, away from it, of the movable half-pulley 70 and therefore its movement towards the fixed half-pulley 60.
  • the centrifugal masses 80d have a spherical shape for interacting with the flange 90 formed in a manner similar to that of the flange 9 of the first embodiment.
  • a pulley 500 on a driven shaft comprises a fixed conical half-pulley 600 which is keyed onto the driven shaft 2 and a conical half-pulley 700 which is axially movable with respect to the fixed half-pulley 600.
  • the pulley 500 has a conico-cylindrical shape and, in its cylindrical portion, opposite to the fixed conical half-pulley 600, has a cavity 800 similarly slidable with splined profiles 800a, 800b, as in the first embodiment.
  • the cavity 800 has several radial-travel tracks 800c for at least one pair of centrifugal masses 800d intended to come into contact with the flange 900 so as to cause the movement, away from it, of the movable half-pulley 700 and therefore its movement towards the fixed half-pulley 600.
  • the centrifugal masses 800d have a trapezoidal prismatic shape so as to interact with the flange 900 formed in a similar manner to the flange 9 of the first embodiment.
  • the operating principle of the device is the same for all the embodiments described and may be summarised as follows:
  • the groove 53 of the driven-shaft pulley 5, 50, 500 is in the fully open condition and the transmission ratio between driving shaft 1 and driven shaft 2 is high.
  • the device therefore allows the number of revs of the alternator to be increased with respect to the crankshaft, thereby increasing the current output of the generator in low speed ranges.
  • the transmission ratio between driving shaft 1 and driven shaft 2 is therefore gradually reduced with an increase in the number of revs of the crankshaft.
  • the device therefore allows the number of revs of the alternator to be controlled with respect to the crankshaft, preventing the alternator from running at a needlessly high speed, but providing a high output (high rpm of the engine) and an increase in the overall efficiency of the alternator, in particular at the middle running speeds of the engine.
  • the rigidity of the helical spring 45 and the configuration of the sliding cavity of the driven-shaft pulley are chosen so as to provide the alternator with the characteristic curve which is appropriate for the desired operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Transmissions By Endless Flexible Members (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP99203216A 1998-10-06 1999-10-01 Dispositif pour la régulation d'un alternateur pour véhicules Withdrawn EP0993098A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI982144 1998-10-06
IT002144 IT1302608B1 (it) 1998-10-06 1998-10-06 Dispositivo di regolazione di un generatore elettrico utilizzato suun veicolo

Publications (2)

Publication Number Publication Date
EP0993098A2 true EP0993098A2 (fr) 2000-04-12
EP0993098A3 EP0993098A3 (fr) 2002-07-17

Family

ID=11380813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99203216A Withdrawn EP0993098A3 (fr) 1998-10-06 1999-10-01 Dispositif pour la régulation d'un alternateur pour véhicules

Country Status (2)

Country Link
EP (1) EP0993098A3 (fr)
IT (1) IT1302608B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004100340A3 (fr) * 2003-05-09 2005-01-13 Sew Eurodrive Gmbh & Co Entrainement compact
WO2005048436A3 (fr) * 2003-11-13 2005-08-11 Sew Eurodrive Gmbh & Co Entrainement compact, reducteur conique a decalage axial et procede pour produire un entrainement
FR2874986A1 (fr) 2004-09-06 2006-03-10 Renault Sas Poulie a gorge variable munie d'un dispositif de regulation du rayon de la gorge
CN100514798C (zh) * 2003-05-09 2009-07-15 索尤若驱动有限及两合公司 紧凑型驱动装置
EP2264864A3 (fr) * 2003-11-13 2017-11-22 SEW-EURODRIVE GmbH & Co. KG Entrainement compact

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1385823A (en) * 1971-04-29 1975-03-05 Siemens Ag Centrifugal control devices
JPS58180862A (ja) * 1982-04-16 1983-10-22 Nissan Motor Co Ltd 自動車用無段変速補機駆動装置
GB2129072A (en) * 1982-10-27 1984-05-10 Riccardo Bertolino Expanding pulley
DE3343582A1 (de) * 1982-12-03 1984-08-02 A.M.S.E.A. Azienda Meccanica Stampaggi e Attrezzature S.p.A., Caselette, Torino Kraftuebertragung mit variablem drehzahlverhaeltnis
US5254043A (en) * 1992-11-17 1993-10-19 Vincent F. Colvin Variable transmission pulley

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1385823A (en) * 1971-04-29 1975-03-05 Siemens Ag Centrifugal control devices
JPS58180862A (ja) * 1982-04-16 1983-10-22 Nissan Motor Co Ltd 自動車用無段変速補機駆動装置
GB2129072A (en) * 1982-10-27 1984-05-10 Riccardo Bertolino Expanding pulley
DE3343582A1 (de) * 1982-12-03 1984-08-02 A.M.S.E.A. Azienda Meccanica Stampaggi e Attrezzature S.p.A., Caselette, Torino Kraftuebertragung mit variablem drehzahlverhaeltnis
US5254043A (en) * 1992-11-17 1993-10-19 Vincent F. Colvin Variable transmission pulley

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 022 (M-272), 31 January 1984 (1984-01-31) & JP 58 180862 A (NISSAN JIDOSHA KK), 22 October 1983 (1983-10-22) *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004100340A3 (fr) * 2003-05-09 2005-01-13 Sew Eurodrive Gmbh & Co Entrainement compact
US7452298B2 (en) 2003-05-09 2008-11-18 Sew-Eurodrive Gmbh & Co. Kg Compact drive
CN100514798C (zh) * 2003-05-09 2009-07-15 索尤若驱动有限及两合公司 紧凑型驱动装置
WO2005048436A3 (fr) * 2003-11-13 2005-08-11 Sew Eurodrive Gmbh & Co Entrainement compact, reducteur conique a decalage axial et procede pour produire un entrainement
US7846054B2 (en) 2003-11-13 2010-12-07 Sew-Eurodrive Gmbh & Co. Kg Compact drive, spiroid gear unit, and method for manufacturing a drive unit
US8079289B2 (en) 2003-11-13 2011-12-20 Sew-Eurodrive Gmbh & Co. Kg Compact drive, spiroid gear unit, and method for manufacturing a drive unit
US8943673B2 (en) 2003-11-13 2015-02-03 Sew-Eurodrive Gmbh & Co. Kg Method for manufacturing a drive unit
US9184644B2 (en) 2003-11-13 2015-11-10 Sew-Eurodrive Gmbh & Co. Kg Method for manufacturing a compact drive unit
EP2264864A3 (fr) * 2003-11-13 2017-11-22 SEW-EURODRIVE GmbH & Co. KG Entrainement compact
EP2264863A3 (fr) * 2003-11-13 2017-12-06 SEW-EURODRIVE GmbH & Co. KG Entrainement compact
FR2874986A1 (fr) 2004-09-06 2006-03-10 Renault Sas Poulie a gorge variable munie d'un dispositif de regulation du rayon de la gorge

Also Published As

Publication number Publication date
ITMI982144A1 (it) 2000-04-06
EP0993098A3 (fr) 2002-07-17
IT1302608B1 (it) 2000-09-29

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